CA1130089A - Device for applying a coating to a material web - Google Patents
Device for applying a coating to a material webInfo
- Publication number
- CA1130089A CA1130089A CA329,594A CA329594A CA1130089A CA 1130089 A CA1130089 A CA 1130089A CA 329594 A CA329594 A CA 329594A CA 1130089 A CA1130089 A CA 1130089A
- Authority
- CA
- Canada
- Prior art keywords
- line
- coating
- knife
- clamping jaw
- coating knife
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired
Links
- 239000011248 coating agent Substances 0.000 title claims abstract description 105
- 238000000576 coating method Methods 0.000 title claims abstract description 105
- 239000000463 material Substances 0.000 title claims abstract description 19
- 230000013011 mating Effects 0.000 claims description 23
- 230000007246 mechanism Effects 0.000 claims description 4
- 230000003028 elevating effect Effects 0.000 claims description 2
- 230000001154 acute effect Effects 0.000 claims 2
- 230000003213 activating effect Effects 0.000 claims 1
- 230000006378 damage Effects 0.000 description 2
- 238000005259 measurement Methods 0.000 description 1
- 238000012806 monitoring device Methods 0.000 description 1
- 230000001105 regulatory effect Effects 0.000 description 1
Classifications
-
- D—TEXTILES; PAPER
- D21—PAPER-MAKING; PRODUCTION OF CELLULOSE
- D21H—PULP COMPOSITIONS; PREPARATION THEREOF NOT COVERED BY SUBCLASSES D21C OR D21D; IMPREGNATING OR COATING OF PAPER; TREATMENT OF FINISHED PAPER NOT COVERED BY CLASS B31 OR SUBCLASS D21G; PAPER NOT OTHERWISE PROVIDED FOR
- D21H25/00—After-treatment of paper not provided for in groups D21H17/00 - D21H23/00
- D21H25/08—Rearranging applied substances, e.g. metering, smoothing; Removing excess material
- D21H25/10—Rearranging applied substances, e.g. metering, smoothing; Removing excess material with blades
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05C—APPARATUS FOR APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05C11/00—Component parts, details or accessories not specifically provided for in groups B05C1/00 - B05C9/00
- B05C11/02—Apparatus for spreading or distributing liquids or other fluent materials already applied to a surface ; Controlling means therefor; Control of the thickness of a coating by spreading or distributing liquids or other fluent materials already applied to the coated surface
- B05C11/04—Apparatus for spreading or distributing liquids or other fluent materials already applied to a surface ; Controlling means therefor; Control of the thickness of a coating by spreading or distributing liquids or other fluent materials already applied to the coated surface with blades
- B05C11/041—Apparatus for spreading or distributing liquids or other fluent materials already applied to a surface ; Controlling means therefor; Control of the thickness of a coating by spreading or distributing liquids or other fluent materials already applied to the coated surface with blades characterised by means for positioning, loading, or deforming the blades
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05C—APPARATUS FOR APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05C11/00—Component parts, details or accessories not specifically provided for in groups B05C1/00 - B05C9/00
- B05C11/02—Apparatus for spreading or distributing liquids or other fluent materials already applied to a surface ; Controlling means therefor; Control of the thickness of a coating by spreading or distributing liquids or other fluent materials already applied to the coated surface
- B05C11/04—Apparatus for spreading or distributing liquids or other fluent materials already applied to a surface ; Controlling means therefor; Control of the thickness of a coating by spreading or distributing liquids or other fluent materials already applied to the coated surface with blades
- B05C11/045—Apparatus for spreading or distributing liquids or other fluent materials already applied to a surface ; Controlling means therefor; Control of the thickness of a coating by spreading or distributing liquids or other fluent materials already applied to the coated surface with blades characterised by the blades themselves
Landscapes
- Coating Apparatus (AREA)
- Application Of Or Painting With Fluid Materials (AREA)
- Electronic Switches (AREA)
- Encapsulation Of And Coatings For Semiconductor Or Solid State Devices (AREA)
- Non-Metallic Protective Coatings For Printed Circuits (AREA)
Abstract
DEVICE FOR APPLYING A COATING TO A MATERIAL WEB
Abstract Of The Disclosure A device for continuous application of coating of con-stant thickness to a web employing an elastic coating knife fixed in a clamping jaw and having a free edge parallel with a fixing line, the knife being prestressed against the web which is running over a roll, the knife center area being supported along a supporting line, the clamping jaw being pivotable about the abutting line of the knife on the roll and about a line outside the fixing line in which the abutt-ing and supporting lines are fixed relative to the roll and the fixing line is continuously shiftable relative to the roll.
Abstract Of The Disclosure A device for continuous application of coating of con-stant thickness to a web employing an elastic coating knife fixed in a clamping jaw and having a free edge parallel with a fixing line, the knife being prestressed against the web which is running over a roll, the knife center area being supported along a supporting line, the clamping jaw being pivotable about the abutting line of the knife on the roll and about a line outside the fixing line in which the abutt-ing and supporting lines are fixed relative to the roll and the fixing line is continuously shiftable relative to the roll.
Description
~300~g .
Background Of The Invention The present invention relates to a devlce for the con-tlnuous application of a coating of constant thlckness to a material web, having an elastic coating knife, which is fixed on-one side in a clamping jaw and on its free edge parallel to the fixing line is put under prestress against a material web being guided over a mating roll, with coating material applied at a sharp angle to the moving direction of said material web, and which at its center area is backed up along a supporting line, and where the clamping jaw is pivotable about the abutt-lng line and around the coating knife on the matlng roll and around a line outside the fixing line.
Such form of device is known, e.g., in U.S.Patent 3,187,718. With the device shown there, the clamping jaw is plvotable not only around the coating knife fixing line on the mating roll but around a line outside the fixing line. With the pivoting around the fixing line the angle of incidence of the unstressed coating knife, and with the pivoting around the line outside the fixing line, the prestress of the coating knlfc can be adjusted simultaneously with variations in the angle of incidence. A change in prestress and thus simultane-ously in angula incidence is made possible also by a horizon-tal, linear shift of the clamping jaw. A precision setting of the coating knife is possible by varying the pressure in a hose trained on the supporting llne.
By the German laid open application No. 24 35 527 ther~
18 further known a coating device wit~ the clamplng jaw ~eing plvotable about a single line between the abutting line and the supporting line of the unstressed coating kn'fe whercby . .
~upporting line and fixing line are both being pivoted. Thcre-fore the geometrical configuration of the coating knife bctween abutting line and supporting line is automatically varicd whcn adjustlng the prestress ~f the coating knife. A variation oF
the coating knife angle of lncidence is not possiblc anyway wlthout varying the prestress of the coating knife.
Background Of The Invention The present invention relates to a devlce for the con-tlnuous application of a coating of constant thlckness to a material web, having an elastic coating knife, which is fixed on-one side in a clamping jaw and on its free edge parallel to the fixing line is put under prestress against a material web being guided over a mating roll, with coating material applied at a sharp angle to the moving direction of said material web, and which at its center area is backed up along a supporting line, and where the clamping jaw is pivotable about the abutt-lng line and around the coating knife on the matlng roll and around a line outside the fixing line.
Such form of device is known, e.g., in U.S.Patent 3,187,718. With the device shown there, the clamping jaw is plvotable not only around the coating knife fixing line on the mating roll but around a line outside the fixing line. With the pivoting around the fixing line the angle of incidence of the unstressed coating knife, and with the pivoting around the line outside the fixing line, the prestress of the coating knlfc can be adjusted simultaneously with variations in the angle of incidence. A change in prestress and thus simultane-ously in angula incidence is made possible also by a horizon-tal, linear shift of the clamping jaw. A precision setting of the coating knife is possible by varying the pressure in a hose trained on the supporting llne.
By the German laid open application No. 24 35 527 ther~
18 further known a coating device wit~ the clamplng jaw ~eing plvotable about a single line between the abutting line and the supporting line of the unstressed coating kn'fe whercby . .
~upporting line and fixing line are both being pivoted. Thcre-fore the geometrical configuration of the coating knife bctween abutting line and supporting line is automatically varicd whcn adjustlng the prestress ~f the coating knife. A variation oF
the coating knife angle of lncidence is not possiblc anyway wlthout varying the prestress of the coating knife.
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`
' , .
~300~9 On applying a coating of constant thickness to a mater-lal web by means of an elastic coating knife, the layer wclght or stroke weight, i.e., the coating thickness is a function on the one hand of the prestress force, by which the coating knife ls pressed against the mating roll, and on the other hand of the moving speed of the material web, the viscosity of a coat-lng ~aterial, e.g., of a brushing-on color, and the geometri~
shape of the wedge gap between coating knife and material web, l.e., the coating knife angle of incidence. Of these magnitudes the coating knife prestress and angle of incidence can be varie~l in order to set the layer thickness. At an equilibrium be~ween prestress force and hydrodynamic pressure force a specific dlstance between free coating knife edge and mating roll is pxoduced, which determines the layer weight.
With the aforementioned device, variations in both coat-ing knife angle of incidence and coating knife prestress are possible. Coating knife prestress settings rated at constant angle of incidence, l.e., constant geometric ratios between coating knife and mating roll, however, are neither possible nor intended-ummary Of The Invention The object of the invention is to produce a device of the above described type, which enables the user to vary the . ,,~ .
~ coating knife prestress for setting and~or serve-controlling ,~.;
the coating thickness without any change produced in the geo-metric ratios between coating knife and matlng roll, i.~., ln the angle of incidcnce.
Thls problem is solved according to the invention by arrangement that the abutting line and supporting line of the coating knife under continuous coating operating conditions and whlle varying the coatlng knife prestress arranged unvaryingly relative to the mating roll, and that the fixlng line of the coating knife is shiftable with the clamping jaw by means of a llnear guldance at a sharp angle to a plano specifled by the
`
' , .
~300~9 On applying a coating of constant thickness to a mater-lal web by means of an elastic coating knife, the layer wclght or stroke weight, i.e., the coating thickness is a function on the one hand of the prestress force, by which the coating knife ls pressed against the mating roll, and on the other hand of the moving speed of the material web, the viscosity of a coat-lng ~aterial, e.g., of a brushing-on color, and the geometri~
shape of the wedge gap between coating knife and material web, l.e., the coating knife angle of incidence. Of these magnitudes the coating knife prestress and angle of incidence can be varie~l in order to set the layer thickness. At an equilibrium be~ween prestress force and hydrodynamic pressure force a specific dlstance between free coating knife edge and mating roll is pxoduced, which determines the layer weight.
With the aforementioned device, variations in both coat-ing knife angle of incidence and coating knife prestress are possible. Coating knife prestress settings rated at constant angle of incidence, l.e., constant geometric ratios between coating knife and mating roll, however, are neither possible nor intended-ummary Of The Invention The object of the invention is to produce a device of the above described type, which enables the user to vary the . ,,~ .
~ coating knife prestress for setting and~or serve-controlling ,~.;
the coating thickness without any change produced in the geo-metric ratios between coating knife and matlng roll, i.~., ln the angle of incidcnce.
Thls problem is solved according to the invention by arrangement that the abutting line and supporting line of the coating knife under continuous coating operating conditions and whlle varying the coatlng knife prestress arranged unvaryingly relative to the mating roll, and that the fixlng line of the coating knife is shiftable with the clamping jaw by means of a llnear guldance at a sharp angle to a plano specifled by the
-3-: .
. : ' ' ,.. '.`. ' '' ::
: . : ' : , , . ~i; . ::
1130~9 unstrcssed coatlng ~nlfe. Such a coatlng device developmcnt is partlcularly advantageous for low layer weights, where the hydrodynamic pressure force is to be kept at a maximally con-stant level.
On setting the devlce according to the invention, the coating knife first ls pivoted into unstressed contact with the material web ar.d/or the mating roll. Subsequently, the angle o incidence between coating knife and mating roll is adjusted to hydrodynamic pressure optimal ratios by pivoting the clamping jaw about the coating knife abutting line. The setting of the coating thickness and/or layer weight and also the operational control andJor servo control then takes place by shifting the coating knife fixing line relative to the mat-lng roll with the coating knife configuration between abutting llne and supporting line remalning unchanged. This insures that ln the prestress setting area the coating knife does not change its configuration between abuttlng and supporting lines whlle simultaneously a hlghly sensitive adjustment can be carried out.
~ or practical reasons said linear guidance is that of a brace-slot carried clamping jaw sliding guide. An advantage-ous way of shifting the clamping jaw is to provide for spindle-type elevatlng mechanlsms and a geared motor. This results in a sensltive and reproducibly settable regulating unit for coatlng thlckness control and servo control.
Expediently the supporting llne backup ln the coatinq knife ccntral area is of a linear and rigid type. This con-trlbutes to keeping the-coating knife configuration between ~butting line and supporting line and thus the hydrodynamic pressure beinq rated at various coating knife prestress values against the back pressure roll at a constant level.
. : ' ' ,.. '.`. ' '' ::
: . : ' : , , . ~i; . ::
1130~9 unstrcssed coatlng ~nlfe. Such a coatlng device developmcnt is partlcularly advantageous for low layer weights, where the hydrodynamic pressure force is to be kept at a maximally con-stant level.
On setting the devlce according to the invention, the coating knife first ls pivoted into unstressed contact with the material web ar.d/or the mating roll. Subsequently, the angle o incidence between coating knife and mating roll is adjusted to hydrodynamic pressure optimal ratios by pivoting the clamping jaw about the coating knife abutting line. The setting of the coating thickness and/or layer weight and also the operational control andJor servo control then takes place by shifting the coating knife fixing line relative to the mat-lng roll with the coating knife configuration between abutting llne and supporting line remalning unchanged. This insures that ln the prestress setting area the coating knife does not change its configuration between abuttlng and supporting lines whlle simultaneously a hlghly sensitive adjustment can be carried out.
~ or practical reasons said linear guidance is that of a brace-slot carried clamping jaw sliding guide. An advantage-ous way of shifting the clamping jaw is to provide for spindle-type elevatlng mechanlsms and a geared motor. This results in a sensltive and reproducibly settable regulating unit for coatlng thlckness control and servo control.
Expediently the supporting llne backup ln the coatinq knife ccntral area is of a linear and rigid type. This con-trlbutes to keeping the-coating knife configuration between ~butting line and supporting line and thus the hydrodynamic pressure beinq rated at various coating knife prestress values against the back pressure roll at a constant level.
-4-:
.
11300~39 For the backup of the supporting line expediently a rigid comb ridge with linear abutment on the coating knife is provided, which is adjustable along the supporting line via draw-in bolts and pressure screws in the brace.
Finally for practical reasons the coating knife is so tapèred according to the constant angle of incidence that a narrow obtuse-angular edge is maintained in the fron-tal area of the coating knife back. The result is that the coating knife edge does not have to be ground in first but lQ is preground by the chamfer and frontally abuts on the ma-terial web and/or mating roll with a relatively broad sur-face. The purpose of the narrow blunt edge in the coating :
knife back areais, among others, to avoid injuries on instal-ling the coating knife.
Particularly for high layer weights it may be of t advantage to carry out--instead of a coating knife pres-tress control and servo control--a coating knife angle-of-.
incidence control and servo control. This, too, is possible ~. .
with a device according to the invention by proceeding from .~ .
~ 20 the setting of a coating knife basic angle of incidence and , .
basic prestress, where however, expediently a coating knife without chamfered edge is used. -; Brief Description Of The Drawings , :
An exemplified embodiment of the invention is des-cribed below in more detail with reference to attached draw-ings wherein like reference numerals are used to denote like parts.
~( I
. .
11300~9 . .
FIG. 1 shows a schematized lateral view of a coat-ing device, whereby the applicator mechanism is omitted.
FIG. 2 a cutout from FIG. 1 drawn to an enlarged scale with an unstressed coating knife pivo- , ted against the mating roll;
FIG. 3 a cutout according to FIG. 2 with prestressed coating knife;
`- FIG. 4 the upper part of a coating knife with an edge chamfered according to the invention; and FIG. 5 a top-viewed cutout of a comb ridge.
Description Of The Preferred Embodiments ., :
The coating device shown in FIG. l is e~uipped with E
a coating knife 1, which abuts on a material web 4 with ex- I
15 cess applied coating material 5 being run over a mating roll t , . . . ~
3 along an abutting line 2. Coating knife 1 is fixed in a ,~. .
clamping jaw 7 along a fixing line 6, and is supported along supporting line 8 by a comb ridge 10 seated in a brace 9.
E~ Clamping jaw 7 is pivoted around axis 12 by means ;.i 20 of a setting device 11 to the extent that coating knife 1 is pivoted away from mating roll 3 and pivoted back, i.e., ` pivotable in the directions of double arrow 13.
A further setting device 14 insures that clamping jaw 7 can be pivoted around abutting line 2 in the direction 25 of double arrow 15. This pivoting serves the incidence-angular setting of coating knife 1 relative to mating roll 3.
FI~S. 1 and 2 show the coating knife 1 in an un-.
.. ~< .
.
.. . .
.. . . - -; . , ~3~0~9 stressed position abutting on material web 2 and/or mating roll 3. To be able to adjust the prestress of coating knife 1 at unchanged angular incidence thereof relative to mating roll 3 the clamping jaw 7 is carried slidingly to a slot 16 of brace 9. To shift clamping jaw 7 in slot 16, spindle-type elevating mechanisms 17 and a geared motor 18 are provided. FIG. 3 shows coating knife 1 in a prestressed position produced by actuating geared motor 18 without changing the angle of incidence and the geometric configuration of coating knife 10 1 between abutting line 2 and supporting line 8.
On setting the described coating device the coating ;
-~ knife 1 first is brought to an unstressed abutment on mating roll 3 along abutting line 2. Subsequently, the coating knife l-angle of incidence relative to mating roll 3 is setby means 15 of setting device 14. Finally, the prestress of coating knife 1 is set in above described way by means of geared motor 18.
The prestress then is operationally servo-controlled and/or readjusted to a constant value for keeping the layer weight and/or coating thickness at a constant level. This operation is particu-20 larly suitable for low layer weights.
If so required, the coating thickness can be adjustedby proceeding from a coating knife basic angle of incidence and basic prestress also through operationally varying the angle of incidence via setting device 14, which is of advantage particu-25 larly with higher layer weights.
FIG. 4 shows the upper part of a coating knife 1, whichis equipped with a polished section 19 set at an angle according :
:
.
~:
, " 1~300~9 to the coating knife l-angle of incidence against mating roll 3. The chamfer or polished section 19 is so designed that a narrow blunt edge 20 is maintained in the frontal area of the coating knife back, this to avoid injuries on installing the coating knife. Said chamfering of coating knife 1 avoids a grind-in period on inserting a new coating knife, and the coat-ing knife geometric ratios even in the area of abutting line 2 remain completely constant. However, if operationally the angle of incidence of coating knife 1 relative to mating roll .
3 is to be varied, it is expedient to use a coating knife without a polished section 19.
FIG. 5 finally shows a detail in top view of comb ridge 10 with slots 21. Said comb ridge is rigid and so designed that it results in a linear and rigid backup of supporting line 8 in the central area of coating knife 1. Rigid comb ridge 10 is adjustable in brace 9 via draw-in bolts and pressure screws 22 (see FIGS. 2 and 3). Together with this arrangement of coat- .
ing knife l-supporting line 8 the latter's linear backup substan-., tially contributes to maintaining the geometric configuration of coating knife 1 between supporting line 8 and abutting line 2 independent from the prestress of said coating knife 1. The latter along its fixing line 24 is rigidly locked with clamping jaw 7 by means of clamp rail 23. :
; The position of clamping jaw 7 relative to brace 9 and thus the prestress of coating knife 1 can be digitally indica-ted in e simpIe w~y on the control console. Thus both an easy .~
~ ` :
.
113(~0~9 and precise reproducibility and fully-automated control and/or servo control of the system is feasible by timing the geared motor. The rated value can be derived from the units of measure-ment of a layer-weight monitoring device.
. ~ .
: - .
.
11300~39 For the backup of the supporting line expediently a rigid comb ridge with linear abutment on the coating knife is provided, which is adjustable along the supporting line via draw-in bolts and pressure screws in the brace.
Finally for practical reasons the coating knife is so tapèred according to the constant angle of incidence that a narrow obtuse-angular edge is maintained in the fron-tal area of the coating knife back. The result is that the coating knife edge does not have to be ground in first but lQ is preground by the chamfer and frontally abuts on the ma-terial web and/or mating roll with a relatively broad sur-face. The purpose of the narrow blunt edge in the coating :
knife back areais, among others, to avoid injuries on instal-ling the coating knife.
Particularly for high layer weights it may be of t advantage to carry out--instead of a coating knife pres-tress control and servo control--a coating knife angle-of-.
incidence control and servo control. This, too, is possible ~. .
with a device according to the invention by proceeding from .~ .
~ 20 the setting of a coating knife basic angle of incidence and , .
basic prestress, where however, expediently a coating knife without chamfered edge is used. -; Brief Description Of The Drawings , :
An exemplified embodiment of the invention is des-cribed below in more detail with reference to attached draw-ings wherein like reference numerals are used to denote like parts.
~( I
. .
11300~9 . .
FIG. 1 shows a schematized lateral view of a coat-ing device, whereby the applicator mechanism is omitted.
FIG. 2 a cutout from FIG. 1 drawn to an enlarged scale with an unstressed coating knife pivo- , ted against the mating roll;
FIG. 3 a cutout according to FIG. 2 with prestressed coating knife;
`- FIG. 4 the upper part of a coating knife with an edge chamfered according to the invention; and FIG. 5 a top-viewed cutout of a comb ridge.
Description Of The Preferred Embodiments ., :
The coating device shown in FIG. l is e~uipped with E
a coating knife 1, which abuts on a material web 4 with ex- I
15 cess applied coating material 5 being run over a mating roll t , . . . ~
3 along an abutting line 2. Coating knife 1 is fixed in a ,~. .
clamping jaw 7 along a fixing line 6, and is supported along supporting line 8 by a comb ridge 10 seated in a brace 9.
E~ Clamping jaw 7 is pivoted around axis 12 by means ;.i 20 of a setting device 11 to the extent that coating knife 1 is pivoted away from mating roll 3 and pivoted back, i.e., ` pivotable in the directions of double arrow 13.
A further setting device 14 insures that clamping jaw 7 can be pivoted around abutting line 2 in the direction 25 of double arrow 15. This pivoting serves the incidence-angular setting of coating knife 1 relative to mating roll 3.
FI~S. 1 and 2 show the coating knife 1 in an un-.
.. ~< .
.
.. . .
.. . . - -; . , ~3~0~9 stressed position abutting on material web 2 and/or mating roll 3. To be able to adjust the prestress of coating knife 1 at unchanged angular incidence thereof relative to mating roll 3 the clamping jaw 7 is carried slidingly to a slot 16 of brace 9. To shift clamping jaw 7 in slot 16, spindle-type elevating mechanisms 17 and a geared motor 18 are provided. FIG. 3 shows coating knife 1 in a prestressed position produced by actuating geared motor 18 without changing the angle of incidence and the geometric configuration of coating knife 10 1 between abutting line 2 and supporting line 8.
On setting the described coating device the coating ;
-~ knife 1 first is brought to an unstressed abutment on mating roll 3 along abutting line 2. Subsequently, the coating knife l-angle of incidence relative to mating roll 3 is setby means 15 of setting device 14. Finally, the prestress of coating knife 1 is set in above described way by means of geared motor 18.
The prestress then is operationally servo-controlled and/or readjusted to a constant value for keeping the layer weight and/or coating thickness at a constant level. This operation is particu-20 larly suitable for low layer weights.
If so required, the coating thickness can be adjustedby proceeding from a coating knife basic angle of incidence and basic prestress also through operationally varying the angle of incidence via setting device 14, which is of advantage particu-25 larly with higher layer weights.
FIG. 4 shows the upper part of a coating knife 1, whichis equipped with a polished section 19 set at an angle according :
:
.
~:
, " 1~300~9 to the coating knife l-angle of incidence against mating roll 3. The chamfer or polished section 19 is so designed that a narrow blunt edge 20 is maintained in the frontal area of the coating knife back, this to avoid injuries on installing the coating knife. Said chamfering of coating knife 1 avoids a grind-in period on inserting a new coating knife, and the coat-ing knife geometric ratios even in the area of abutting line 2 remain completely constant. However, if operationally the angle of incidence of coating knife 1 relative to mating roll .
3 is to be varied, it is expedient to use a coating knife without a polished section 19.
FIG. 5 finally shows a detail in top view of comb ridge 10 with slots 21. Said comb ridge is rigid and so designed that it results in a linear and rigid backup of supporting line 8 in the central area of coating knife 1. Rigid comb ridge 10 is adjustable in brace 9 via draw-in bolts and pressure screws 22 (see FIGS. 2 and 3). Together with this arrangement of coat- .
ing knife l-supporting line 8 the latter's linear backup substan-., tially contributes to maintaining the geometric configuration of coating knife 1 between supporting line 8 and abutting line 2 independent from the prestress of said coating knife 1. The latter along its fixing line 24 is rigidly locked with clamping jaw 7 by means of clamp rail 23. :
; The position of clamping jaw 7 relative to brace 9 and thus the prestress of coating knife 1 can be digitally indica-ted in e simpIe w~y on the control console. Thus both an easy .~
~ ` :
.
113(~0~9 and precise reproducibility and fully-automated control and/or servo control of the system is feasible by timing the geared motor. The rated value can be derived from the units of measure-ment of a layer-weight monitoring device.
. ~ .
: - .
Claims (6)
OR PRIVILEGE IS CLAIMED ARE DEFINED AS FOLLOWS:
1. In a device for the continuous application of a coating of constant thickness to a material web, being transported over a rotating mating roll of the type including an elastic coating knife having two edges, one of said edges being fixed in a clamping jaw and the other edge being free, said coating knife being initially in an unstressed condition, the fixed edge defin-ing a fixing line in said clamping jaw and said free edge being parallel thereto, said free edge abutting said material web along a line defining an abutting line at a predetermined angle of incidence between said coating knife and said material web, the coating material being applied to said moving web such that the coating material passes between the free edge of said knife and said web for controlling the thickness of said coating material applied thereto, said coating knife being supported between said abutting line and said fixing line by support means along a line defining a supporting line, and said clamping jaw being pivotable about said abutting line and around an axis outside said fixing line forsetting said predetermined angle of incidence, the improvement comprising:
means for moving said fixing line to impart to and vary the stress of said coating knife and thereby adjust the thickness of said coating material under continuous coating operating conditions and for maintaining the geometric configuration of said coating knife between said abutting line and said supporting line substantially fixed relative to said mating roll upon movement of said fixing line, said moving means including essentially linear guidance means connected to said clamping jaw for shifting the clamping jaw and thereby said fixing line relative to said mating roll linearly along a plane defining an acute angle with respect to the plane defining an acute angle with respect to the plane of said unstressed coating knife whereby said angle of incidence is substantially unchanged upon varying of the stress of said coating knife.
means for moving said fixing line to impart to and vary the stress of said coating knife and thereby adjust the thickness of said coating material under continuous coating operating conditions and for maintaining the geometric configuration of said coating knife between said abutting line and said supporting line substantially fixed relative to said mating roll upon movement of said fixing line, said moving means including essentially linear guidance means connected to said clamping jaw for shifting the clamping jaw and thereby said fixing line relative to said mating roll linearly along a plane defining an acute angle with respect to the plane defining an acute angle with respect to the plane of said unstressed coating knife whereby said angle of incidence is substantially unchanged upon varying of the stress of said coating knife.
2. A device according to claim 1, wherein said essentially linear guidance means comprises a brace having therein a slot for slidably receiving said clamping jaw, said slot defining a linear path for movement of said clamping jaw relative to said mating roll and means for slidingly shifting said clamping jaw within said slot.
3. A device according to claim 2, wherein said shifting means comprises a spindle-type elevating mechanism coupled to said clamping jaw and a geared motor connected to said mechanism for activating said sliding movement of said clamping jaw.
4. A device according to claim 2, wherein said support means is arranged to support said coating knife substantially centrally between said abutting line and said fixing line.
5. A device according to claim 4, wherein said support means comprises a rigid comb ridge linearly contacting said coat-ing knife.
6. A device according to claim 5, wherein said rigid comb ridge is seated in said brace and is adjustable therein for varying the support pressure along the supporting line by screw means.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DEP2825907.6 | 1978-06-13 | ||
| DE2825907A DE2825907B2 (en) | 1978-06-13 | 1978-06-13 | Device for applying a coating to a material web |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CA1130089A true CA1130089A (en) | 1982-08-24 |
Family
ID=6041688
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CA329,594A Expired CA1130089A (en) | 1978-06-13 | 1979-06-12 | Device for applying a coating to a material web |
Country Status (19)
| Country | Link |
|---|---|
| US (1) | US4220113A (en) |
| JP (1) | JPS5531484A (en) |
| AT (1) | AT371741B (en) |
| BR (1) | BR7903728A (en) |
| CA (1) | CA1130089A (en) |
| CH (1) | CH637552A5 (en) |
| DD (1) | DD143280A5 (en) |
| DE (1) | DE2825907B2 (en) |
| DK (1) | DK145193C (en) |
| ES (1) | ES8203648A1 (en) |
| FI (1) | FI62473C (en) |
| FR (1) | FR2428473B1 (en) |
| GB (1) | GB2029276B (en) |
| IL (1) | IL57536A (en) |
| IT (1) | IT1118765B (en) |
| MX (1) | MX148101A (en) |
| NL (1) | NL184826C (en) |
| NO (1) | NO151731C (en) |
| SE (1) | SE442711B (en) |
Families Citing this family (36)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE2913421C3 (en) * | 1979-04-04 | 1982-04-29 | J.M. Voith Gmbh, 7920 Heidenheim | Method and device for stripping off excess coating material from a moving web |
| DE3017274C2 (en) * | 1980-05-06 | 1985-07-18 | Jagenberg-Werke AG, 4000 Düsseldorf | Device for coating paper webs |
| JPS5814215A (en) * | 1981-07-18 | 1983-01-27 | Mitsubishi Heavy Ind Ltd | Controller for set angle correction |
| US4405661A (en) * | 1981-09-10 | 1983-09-20 | Beloit Corporation | Blade type fountain coater and method |
| DE3236755A1 (en) * | 1982-10-05 | 1984-04-12 | J.M. Voith Gmbh, 7920 Heidenheim | Doctoring device for continuous webs of material, in particular paper webs |
| DE3236991A1 (en) * | 1982-10-06 | 1984-04-12 | J.M. Voith Gmbh, 7920 Heidenheim | Coating device for running webs of material |
| DE3374760D1 (en) * | 1982-11-23 | 1988-01-14 | Jagenberg Ag | Apparatus for coating a moving web of material |
| DE3311999A1 (en) * | 1983-04-02 | 1984-10-11 | J.M. Voith Gmbh, 7920 Heidenheim | COATING DEVICE FOR COATING RUNNING PRODUCTS |
| GB8309530D0 (en) * | 1983-04-08 | 1983-05-11 | Beloit Walmsley Ltd | Paper forming |
| DE3313972A1 (en) * | 1983-04-18 | 1984-10-18 | Jagenberg AG, 4000 Düsseldorf | DEVICE FOR PRELOADING AND PRELOADING AN ELASTIC METAL KNIFE |
| US4569304A (en) * | 1983-08-09 | 1986-02-11 | Aeci Limited | Coating apparatus |
| SE8503345D0 (en) * | 1985-07-05 | 1985-07-05 | Yngve Fundell | COMPARATIVE COVER SHEET |
| DE3709295A1 (en) * | 1987-03-24 | 1988-10-13 | Jagenberg Ag | DEVICE FOR COATING A MATERIAL RAIL |
| DE3729621A1 (en) * | 1987-09-04 | 1989-03-16 | Jagenberg Ag | DEVICE FOR COATING A MATERIAL RAIL THROUGH A COUNTER ROLLER |
| FI82733C (en) * | 1987-09-07 | 1991-04-10 | Valmet Paper Machinery Inc | VINKELKOMPENSATIONSANORDNING FOER SCHABERBLAD. |
| DE3825816A1 (en) * | 1988-07-29 | 1990-02-01 | Jagenberg Ag | DEVICE FOR CONTINUOUSLY COATING A MATERIAL RAIL THROUGH A COUNTER ROLLER |
| DE3908386A1 (en) * | 1989-03-15 | 1990-09-27 | Jagenberg Ag | METHOD AND DEVICE FOR COATING MATERIAL SHEETS, ESPECIALLY PAPER OR CARDBOARD SHEETS |
| AT399832B (en) * | 1989-04-18 | 1995-07-25 | Zimmer Johannes | Squeegee device with a cross or support bar holding the squeegee for application or FOR FLOWING ON OR FLOWING ON FLOWABLE OR ALSO POWDERED SUBSTANCES ON LEVEL SURFACES, RAILWAYS OR THE LIKE. |
| DE3927329A1 (en) * | 1989-08-18 | 1991-02-21 | Jagenberg Ag | DEVICE FOR COATING A MATERIAL RAIL THROUGH A COUNTER ROLLER |
| DE3929458A1 (en) * | 1989-09-05 | 1991-03-14 | Jagenberg Ag | DEVICE FOR MEASURING DEFLECTIONS OF A LONG-STRETCHED MACHINE PART, IN PARTICULAR THE SCRAPER BAR OF A COATING DEVICE |
| DE3934986A1 (en) * | 1989-10-20 | 1991-04-25 | Jagenberg Ag | Doctor blade adjustment - has setting motor with selective coupling to adjustment units for local and automatic setting while working |
| DE3940450A1 (en) * | 1989-12-07 | 1991-06-13 | Voith Gmbh J M | Squeegee device |
| SE468344B (en) * | 1991-09-25 | 1992-12-21 | Btg Kaelle Inventing Ab | DEVICE AND PROCEDURES FOR LEAVE COATING OF A CURRENT PATH |
| DE4207731A1 (en) * | 1992-03-11 | 1993-09-16 | Jagenberg Ag | SUPPORT BAR FOR A COATING DEVICE |
| US5733373A (en) * | 1992-03-11 | 1998-03-31 | Jagenberg Aktiengesellschaft | Pressure strip for coating device |
| US5242498A (en) * | 1992-08-04 | 1993-09-07 | The Kohler Coating Machinery Corporation | Adjustable blade coater |
| DE4334556A1 (en) * | 1993-10-11 | 1995-04-13 | Jagenberg Ag | Device for coating a material web, in particular a paper or cardboard web |
| DE4418464C2 (en) * | 1994-05-27 | 1995-07-06 | Voith Ag J M | Blade holder |
| DE4433048A1 (en) * | 1994-09-16 | 1996-03-21 | Tzn Forschung & Entwicklung | Method and device for the continuous application of a coating to a material web |
| DE19731947A1 (en) * | 1997-07-24 | 1999-01-28 | Voith Sulzer Papiermasch Gmbh | Liquid or paste applicator regulation method |
| DE19734718A1 (en) * | 1997-08-11 | 1999-02-18 | Voith Sulzer Papiermasch Gmbh | Web coating applicator |
| DE19812929A1 (en) * | 1998-03-24 | 1999-09-30 | Voith Sulzer Papiertech Patent | Machine continuously metering and leveling coating of fluid or viscous material |
| FI109370B (en) * | 2001-05-03 | 2002-07-15 | Metso Paper Inc | Setting amount of applied web treatment agent at leveling rod unit involves utilizing computation formula provided for pre-estimating the amount of applied web treatment agent under varying process conditions |
| DE102004040622A1 (en) * | 2004-08-21 | 2006-02-23 | Voith Paper Patent Gmbh | doctor device |
| DE102005008869A1 (en) * | 2005-02-24 | 2006-09-14 | Voith Paper Patent Gmbh | Device for pivoting and adjusting a functional unit |
| CN107199158B (en) * | 2017-07-28 | 2019-06-28 | 东莞市无极净化用品科技有限公司 | A kind of hydraulic cylinder control formula coating blade device |
Family Cites Families (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US1566358A (en) * | 1924-09-05 | 1925-12-22 | Vickerys 1920 Ltd | Doctor for paper machines |
| US3113890A (en) * | 1961-06-26 | 1963-12-10 | Kimberly Clark Co | Apparatus for smoothing coating materials on a paper web |
| US3187718A (en) * | 1962-05-28 | 1965-06-08 | Black Clawson Co | Flexible doctor blade coating apparatus |
| US3229662A (en) * | 1964-01-10 | 1966-01-18 | Time Inc | Blade holding apparatus |
| US3359940A (en) * | 1965-09-17 | 1967-12-26 | Beloit Corp | Blade holding mechanism for coaters |
| SE327895B (en) * | 1967-11-07 | 1970-08-31 | Uddeholms Ab | |
| IT999822B (en) * | 1973-11-26 | 1976-03-10 | Belcit Italia Spa | DEVICE FOR ADJUSTING THE THICKNESS OF THE COATING SUSPENSION LAYER DEPOSED ON A CONTINUOUS PAPER BELT IN A COATING MACHINE |
-
1978
- 1978-06-13 DE DE2825907A patent/DE2825907B2/en active Granted
- 1978-09-27 US US05/946,132 patent/US4220113A/en not_active Expired - Lifetime
-
1979
- 1979-06-01 FI FI791760A patent/FI62473C/en not_active IP Right Cessation
- 1979-06-08 NL NLAANVRAGE7904505,A patent/NL184826C/en not_active IP Right Cessation
- 1979-06-08 IT IT68241/79A patent/IT1118765B/en active
- 1979-06-11 MX MX178016A patent/MX148101A/en unknown
- 1979-06-11 IL IL57536A patent/IL57536A/en unknown
- 1979-06-12 FR FR7915013A patent/FR2428473B1/en not_active Expired
- 1979-06-12 BR BR7903728A patent/BR7903728A/en not_active IP Right Cessation
- 1979-06-12 DD DD79213560A patent/DD143280A5/en not_active IP Right Cessation
- 1979-06-12 SE SE7905164A patent/SE442711B/en unknown
- 1979-06-12 NO NO791959A patent/NO151731C/en unknown
- 1979-06-12 CH CH549479A patent/CH637552A5/en not_active IP Right Cessation
- 1979-06-12 CA CA329,594A patent/CA1130089A/en not_active Expired
- 1979-06-13 ES ES481565A patent/ES8203648A1/en not_active Expired
- 1979-06-13 JP JP7360879A patent/JPS5531484A/en active Granted
- 1979-06-13 DK DK246379A patent/DK145193C/en active
- 1979-06-13 AT AT0422079A patent/AT371741B/en not_active IP Right Cessation
- 1979-06-13 GB GB7920627A patent/GB2029276B/en not_active Expired
Also Published As
| Publication number | Publication date |
|---|---|
| DE2825907B2 (en) | 1981-02-26 |
| JPS6231621B2 (en) | 1987-07-09 |
| IT7968241A0 (en) | 1979-06-08 |
| NO151731C (en) | 1985-06-12 |
| DD143280A5 (en) | 1980-08-13 |
| JPS5531484A (en) | 1980-03-05 |
| CH637552A5 (en) | 1983-08-15 |
| FI791760A7 (en) | 1979-12-14 |
| FI62473B (en) | 1982-09-30 |
| IT1118765B (en) | 1986-03-03 |
| GB2029276A (en) | 1980-03-19 |
| FR2428473B1 (en) | 1985-06-21 |
| NO151731B (en) | 1985-02-18 |
| FR2428473A1 (en) | 1980-01-11 |
| US4220113A (en) | 1980-09-02 |
| SE7905164L (en) | 1979-12-14 |
| ES481565A0 (en) | 1982-04-16 |
| DK145193C (en) | 1983-02-28 |
| DK145193B (en) | 1982-10-04 |
| DE2825907C3 (en) | 1984-07-26 |
| FI62473C (en) | 1983-01-10 |
| NO791959L (en) | 1979-12-14 |
| DK246379A (en) | 1979-12-14 |
| NL184826C (en) | 1989-11-16 |
| GB2029276B (en) | 1982-11-03 |
| MX148101A (en) | 1983-03-14 |
| SE442711B (en) | 1986-01-27 |
| NL7904505A (en) | 1979-12-17 |
| NL184826B (en) | 1989-06-16 |
| ATA422079A (en) | 1982-12-15 |
| ES8203648A1 (en) | 1982-04-16 |
| BR7903728A (en) | 1980-02-12 |
| IL57536A0 (en) | 1979-10-31 |
| IL57536A (en) | 1982-04-30 |
| DE2825907A1 (en) | 1979-12-20 |
| AT371741B (en) | 1983-07-25 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| MKEX | Expiry |